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    Parts of plants Essay (1177 words)

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    These are the parts Of the plant where food is made by photosynthesis. Leaves take in carbon dioxide from the air, water CFML the soil, and energy from the sunlight. During photosynthesis, the leaves use light energy to change carbon dioxide and water into food. (sugar)0 0 Flowers: These are the reproductive parts of a plant. Flower petals and the flowers smell attract insects ND bees to pollinate the flower.

    After pollination, the petals fall off and seeds develop in the part off flower called the ovary. The ovary itself usually becomes what we call the fruit. D Stems: These support the upper parts of plants. Water and dissolved nutrients from the soil travel up the stem in a system of tubes. Food from the leaves travels down stems to the roots. Stems also store food for the plant C Roots: These anchor plants in the soil. Water and minerals are taken from the soil through the roots, Many plants such as carrots, store food in their roots. TTL

    Seeds: these contain a tiny embryo of a plant inside. The seed halves contain food, which supplies energy and materials for growth until the plant grows its first leaves above the ground. ROOT In vascular plants, the root is the organ of a plant that typically lies below the surface Of the soil. However, roots can also be aerial or aerating (growing up above the ground or especially above water). Furthermore, a stem normally occurring below ground is not exceptional either. Therefore, the root is best defined as the non-leaf, non-nodes bearing parts of the plant’s body.

    However, important internal structural differences between stems and roots exist. The first root that comes from a plant is called the radical. The four major functions of roots are 1) absorption of water and inorganic nutrients, 2) anchoring of the plant body to the ground, and supporting it, 3) storage of food and nutrients, 4) vegetative reproduction. In response to the concentration of nutrients, roots also synthesis cytokine, which acts as a signal as to how fast the shoots can grow.

    Roots often function in storage Todd and nutrients. The roots of most vascular Lana species enter into symbiosis with certain fungi to form macrographs, and a large range to other organisms including bacteria also closely associate with roots, ANATOMY When dissected, the arrangement of the cells in a root is root hair, epidermis, pebble, cortex, endoderm, princely and lastly the vascular tissue in the centre of a root to transport the water absorbed by the root to other places of the plant.

    ROOT GROWTH Early root growth is one of the functions of the apical merited located near the tip Of the root. The merited cells more or less continuously divide, producing ore merited, root cap cells (these are sacrificed to protect the merited). And undifferentiated root cells. The latter become the primary tissues Of the root first undergoing elongation. A process that pushes the root tip forward in the growing medium. Gradually these cells differentiate and mature into specialized cells of the root tissues.

    There is correlation of roots using the process of plant perception to sense their physical environment to grow, [1] including the sensory of light, [21 and physical barriers, [3] Plant roots will generally grow n any direction where the correct environment to air, mineral nutrients and water exists to meet the plant’s needs. Roots will shy or shrink away from dry, [4] or other poor soil conditions. Over time, given the right conditions, roots can crack foundations, snap water lines, and lift sidewalks, At germination, roots grow downward due to gravitations, the growth mechanism of plants that also causes the shoot to grow upward.

    In some plants (such as ivy), the “root” actually clings to walls and structures. Growth from apical merits is known as primary Roth, which encompasses all elongation, Secondary growth encompasses all growth in diameter, a major component of woody plant tissues and many monody plants. Poor example, storage roots of sweet potato have secondary growth but are not woody. Secondary growth occurs at the lateral merits, namely the vascular cambium and cork cambium. The former forms secondary xylem and secondary phloem, while the latter forms the premiere.

    In plants with secondary growth, the vascular cambium, originating between the xylem and the phloem, forms a cylinder of tissue along the stem and root. The vascular cambium forms new cells on both the inside and outside Of the cambium cylinder, with those on the inside forming secondary xylem cells. And those on the outside forming secondary phloem cells. As secondary xylem accumulates, the “girth” (lateral dimensions) of the stem and root increases. As a result, tissues beyond the secondary phloem (including the epidermis and cortex, in many cases) tend to be pushed outward and are eventually “sloughed off’ (shed).

    At this point, the cork cambium begins to form the premiere, consisting of protective cork cells containing Siberian. In roots, the cork cambium originates in the princely, a component tooth vascular cylinder. The vascular cambium produces new layers of secondary xylem annually. The xylem vessels are dead at maturity but are responsible tort most water transport through the vascular tissue in stems and roots, Types of roots A true root system consists of a primary root and secondary roots (or lateral roots). The diffuse root system: the primary root is not dominant; the whole root system is fibrous and branches in all directions.

    Most common in monocots. The main function of the fibrous root is to anchor the plant. Specialized roots The roots, or parts of roots, of many plant species have become specialized to serve adaptive purposes besides the two primary functions described in the introduction. Adventitious roots arise out-of-sequence from the more usual root formation of branches of a primary root, and instead originate from the stem, branches, leaves, or old woody roots. They commonly occur in monocots and photosphere, but also in many idiots, such as clover (Trillium), ivy (Header), strawberry (Fragile) and willow (Sails).

    Most aerial roots and stilt roots are adventitious. In some conifers adventitious roots can form the largest part Of the root system. Aerating roots (or knee root or knee or pneumatics’s or Cypress knee): roots rising above the ground, especially above water such as in some mangrove genera (Vicinage, Exonerates). In some plants like Vicinage the erect roots have a large number of breathing pores for exchange of gases. Aerial roots: roots entirely above the ground, such as in My (Header) or in epiphytic orchids.

    They function as prop roots, as in maize or anchor roots or as the trunk n strangler fig, Contractile roots: they pull bulbs or corms of monocots, such as hyacinth and lily, and some taproots, such as dandelion, deeper in the soil through expanding radically and contracting longitudinally. They have a wrinkled surface. Coarse roots: Roots that have undergone secondary thickening and have a woody structure, These roots have some ability to absorb water and nutrients, but their main function is transport and to provide a structure to connect the smaller diameter, fine roots to the rest of the plant.

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